User Manual

Table Of Contents
System Description RF-Orchestra!™ Transmitter Installation and Operation
2-24 6880493G02-C July 2000
AC Power Supply
The AC power supply receives a 240-volt input from the AC distribution panel and provides
+28 Vdc power required by other modules in the transmitter (see Figure 2-13 and Figure 2-14).
Input and outputs are filtered to meet FCC Part 15 Class B operation. Power supply operation
meets UL and CSA agency approval.
The power converter starts with power factor correction circuitry that maintains near zero
phase shift between input voltage and current. The second power conversion drops the high
voltage to +28 volts. The AC power supply reacts quickly to the large power variations that
exist in the InFLEXion protocol. Input current rush is limited to less than 120 A in 10 µs.
Figure 2-13: Power Supply Chassis
Front View
Rear View
302SRH-16
Term 1
Term 2
AC Fan
AC Input
Term 1
Term 2
AC Fan
AC Input
302SRH-27